Well, one possibility is that Harry would use his magic in very unexpected ways during the war. Maybe he'd use spells to confuse the enemy troops or to create illusions to mislead them. His magical skills could give his side an edge in battles.
In a 'Percy Fights Harry Potter' fanfic, perhaps they could fight over differences in their approaches to dealing with Voldemort. Percy, with his by - the - book attitude, might clash with Harry's more instinctive and unorthodox methods.
In a fanfiction where Harry Potter fights Sauron, Harry would be at a disadvantage in terms of raw power. Sauron is an ancient and extremely powerful being. However, Harry has his courage and quick thinking. He could use his ability to solve mysteries and puzzles. He might figure out a way to destroy the One Ring, which would be a huge blow to Sauron. But it wouldn't be easy as Sauron would be constantly trying to stop him.
Well, in such a fanfiction, Harry might use his magic skills like the Patronus charm to fend off the Volturi's attacks. Maybe he could also team up with his Hogwarts friends to create a powerful defense against the Volturi's mind - control powers.
Harry would probably start by trying to understand Thanos' powers. He might use his invisibility cloak to get closer and assess the situation. Then he'd likely use some of his most powerful spells like Avada Kedavra, but it might not be as effective against Thanos as it is against normal foes.
Well, it could be that Harry Potter discovers an evil empire within the wizarding world that has been secretly controlling things. He then uses his magic skills and the help of his friends to fight against it. Maybe there are new dark spells and powerful artifacts involved in this fight.
In a Harry Potter vs Imhotep fanfiction fight, it depends a lot on the setting. If it's in Hogwarts, Harry has the home - field advantage. He knows all the secret passages and can use the magic of the school to his benefit. Imhotep would be out of his element, but his sheer power might still make him a formidable foe. Harry could try to trap Imhotep in the Room of Requirement, but Imhotep might find a way to break free using his ancient magic. It would be a battle full of twists and turns.
In a fanfic where Harry fights the Chitauri, he might use his magic in unexpected ways. For example, he could use spells like 'Expelliarmus' to disarm the Chitauri weapons. His ability to apparate could also give him an advantage in dodging their attacks. Maybe he would team up with some of the Avengers as well, sharing his magical knowledge with them.
Harry's magic would likely change the nature of battles. With spells like 'Expelliarmus', he could disarm large numbers of enemies at once, turning the tide of skirmishes. However, it might also make the war more complex as the enemy would start to develop counter - measures against magic. They could try to find ways to nullify his spells or use magic - users on their side if available.
In such a fanfic, one possibility could be that the Armistice is brokered by an unexpected third party. Maybe a powerful magical creature that both Harry Potter and Voldemort respect. This creature could convince Voldemort that the continuous war is only weakening the wizarding world as a whole and that there could be a better way to achieve his goals without all the bloodshed. Harry, on the other hand, would be skeptical but might see it as an opportunity to finally end the war and start rebuilding the wizarding community.
One possibility is that the Mandalorian's ship, the Razor Crest, could end up near Hogwarts. The students would be amazed by this strange flying machine. The Mandalorian might be searching for a lost Jedi or Sith relic that has some connection to the wizarding world. He could then get involved in the ongoing struggle against Voldemort or other dark forces in the Potter universe.